Hand Diaphragm Primer

Hand Diaphragm Primer Pump

The Hand Diaphragm Primer Pump (DP) is an air pump that creates vacuum suction in a centrifugal pump priming line and pulls water up into the pump to prime it. These centrifugal pump primers are popular for their portability and simplicity.

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Protek Specialty Diaphragm Primer Models: DP5, DP7, and DP9

The DP primer has a flapper check valve in the diaphragm and a disk check valve at the bottom of the unit. Air flows through the bottom check valve on the diaphragm up stroke then through the diaphragm valve on the down stroke. Diaphragm is actuated through a connecting rod eyebolt attached to a fulcrum handle bracket.

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The Protek Specialty DIAPHRAGM PRIMER PUMPS are centrifugal pump primers, ideal for use in irrigation, firefighting, liquid extraction, and fluid distribution applications.

download Hand Diaphragm Primer catalogue

Compatible products : Centrifugal Pump, hand pump, skid.

Common names : hand pump primer, centrifugal pump primer, suction lift
primer, portable primer, centrifugal primer, centrifugal water pump primer, permanent primer.

FEATURES

Lightweight, portable aluminum alloy body.

Easily mounted on most centrifugal pumps.

Tough and durable rubber diaphragm.

Units have a drain valve.

INSTALLATION & OPERATION

Attach primer to centrifugal pump or skid.
- Use non-collapsible hose or flexible tubing to connect primer suction inlet to pump.
Install cut-off valve between the primer suction inlet and pump.
Close cut-off valve immediately after priming.
- Make sure primer drain valve is closed.
- A cut-off valve should be used at the pump discharge to prevent air from being drawn through the discharge line while priming.

MAINTENANCE
Remove any debris under the diaphragm after each use.

Clear all fluids from inside the unit after each use.

TROUBLESHOOTING

If DP is not priming the pump, check the following:

Make sure drain cock is closed.
Inspect check valve for blockage and free movement.
Check suction side for air leaks.
Connecting hoses should be straight and clear of debris.
Call Protek Technical Support for additional help.

Hand Diaphragm Primer – Parts

DP5	DP7		DP9	Description
D0055	D0087		D0062	Lower Housing
D0056	D0088		D0063	Upper Housing
D0054	D0058		D0061	Diaphragm
	D0107		D0104	Mounting Bracket
D0093	D0093		D0093	Handle Bracket
		D0093 Includes:	D0347A	Clevis Pin Assembly
		D0093 Includes:	X0D01	Thumb Screw
D0303				Diaphragm Plate (2 Req’d)
			D0003	1-½” Locknut
D0127-A	D0127-A		D0127-A	Connecting Rod Assembly
D0050	D0050		D0051	Fulcrum Eyebolt
D0004	D0004		D0004	Check Valve
D0340	D0340		D0340	Drain Valve

HANDLE W/ GRIP ASSEMBLY – #D0095
PART #	DESCRIPTION
D0094	Grip
D0094-5	Handle Pipe

Handle W/ Bracket Assembly – #D0047
PART #	DESCRIPTION
D0093	Handle Bracket (Includes 2 Clevis Pin Assemblies & Thumb Screw)
D0095	Handle with Grip Assembly (See Above Chart)

REPAIR KITS D05RK , D07RK , D09RK
PART#	DESCRIPTION
D0004	Check Valve (Disk)
D0054, D0058, D0061	Diaphragm
D0303 (DP5 only)	Diaphragm Plate (2 req.)
D0340	Drain Valve
X0D04	¼-20 x 1″ Bolt (4 Req’d)
X0D10	³/8″ Flat Washer (2 req.)
X0D11	Jam Nut (2 Req.)
X0D12	¼-20 Self Locking Nut (4 Req.)

PRIMER SELECTION CHART
PRIMER	PIPE SIZE
DP5	2”, 3”, 4”
DP7	4”, 5”, 6”
DP9	6”, 8”, or Larger

PRIMER CAPACITY CHART
	# of Strokes to Prime Through 25’ of 4” Suction			# of Strokes to Prime Through 25’ of 6” Suction			# of Strokes to Prime Through 25’ of 8” Suction
PRIMER	5” HG	10” HG	15” HG	5” HG	10” HG	15” HG	5” HG	10” HG	15” HG
DP5	10	27	55
DP7	6	15	32	12	33	65
DP9	4	9	20	10	23	45	17	37	77
* Hg = Inches of Mercury